Pronunciation: p ī - ' r ē - ˌ no ̇ id, ' p ī -r ə -
Function: noun
Etymology: International Scientific Vocabulary, from New Latin pyrena stone of a fruit, from Greek pyr ē n; akin to Greek pyros wheat grain, wheat ― more at FURZE
Date: circa 1875
: one of the protein bodies in the chloroplasts of various lower organisms (as some algae) that are involved in starch synthesis and deposition